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Finding the Fourth Proportional to 420,834.60, 632,807.10 and 352,405.80

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Solution

The fourth proportional to 420,834.60, 632,807.10 and 352,405.80 is: 529,911.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,834.60 : 632,807.10 = 352,405.80 : x
  2. Step 2: Convert to fraction form
    420,834.60/632,807.10 = 352,405.80/x
  3. Step 3: Cross multiply
    420,834.60x = 632,807.10 × 352,405.80
  4. Step 4: Simplify right side
    420,834.60x = 223,004,892,321.18
  5. Step 5: Solve for x
    x = 223,004,892,321.18/420,834.60
  6. Step 6: Final answer
    x = 529,911.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.